A girl's lacrosse stick. Bid refers to a woman (biddy) and the stick refers to the lacrosse stick she uses that is noticeably different from men's lacrosse sticks.
Guy 1: Yo you see that hot girl over there?
Guy 2: You mean the one carrying the bid stick?
Guy 1: Yeah man. The pocket on that lacrosse stick is so small, how the hell do they cradle those things?